Langley, K. M. (1976). A note on the economics of the international petroleum industry and the economy of the Philippines [microform]. Photoduplication Service, University of the Philippines Library.
Цитирование в стиле Чикаго (17-е изд.)Langley, Kathleen M. A Note on the Economics of the International Petroleum Industry and the Economy of the Philippines [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.
Цитирование MLA (9-е изд.)Langley, Kathleen M. A Note on the Economics of the International Petroleum Industry and the Economy of the Philippines [microform]. Photoduplication Service, University of the Philippines Library, 1976.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.